Thanks Orbitalwalsh..
So I could then have these two m.2's running or am I still missing the plot?
x1 of ADATA 256GB XPG SX8200 PRO M.2 NVMe SSD, M.2 2280, PCIe, 3D NAND, R/W 3500/1200 MB/s for Operating System
x1 of ADATA 512GB Ultimate SU800 M.2 SSD, M.2 2280, SATA3, 3D NAND, R/W 560/520...